The only letter not appearing on the Periodic Table is the letter "J".
180
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
The bark of an older redwood tree is fireproof.
65
A cesium atom in an atomic clock beats over nine billion times a second.
43
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
According to studies, men change their minds two to three times more often than women.
72